Powers/Abilities: The Fear-Eaters exist
entirely off of fear of other beings. They can phase
extra-dimensionally, assuming an immaterial form, and merge with
a host. Once merged, they can read the minds of their host,
determining its greatest fears. The Fear-Eater than can generate
hallucinations which cause the host to confront its greatest
fear. The Fear-Eater draws strength from this and will continue
to cause intense fear until its victim either dies or overcomes
its fears. If a Fear-Eater is deprived of fear for too long of a
period, it will die of starvation.

The Fear-Eaters appear to be immune to any form
of physical attack, and the only way a host can repel them is by
overcoming its fears. The Fear-Eaters can survive in any
environment, from the vacuum of space to the most hostile of
atmospheric conditions. A Fear-Eater teleported the Silver Surfer
from deep space to the orbit of Earth. It is uncertain how far a
Fear-Eater can travel without using a host form.

Traits: The Fear-Eaters are predatory
and parasitic in nature. Their abilities may stem from magic.

History: The Fear-Eaters are the
children of the Fear Lord Kkallakkuu. Their age and past
activities are uncertain.

(Marvel Comics Presents#1/4) - One Fear-Eater encountered the Silver Surfer and attempted to make a
meal of him. It transported him to Earth and terrorized him by
trying to trap him within a barrier like the one created by
Galactus. When this failed it bound him in shackles, and then
caused him to revert to the form of Norrin Radd. However, Norrin
overcame his fears, regained his full power and expelled the
Fear-Eater, who then traveled to Earth in search of further prey.

(Marvel Comics Presents#2/4) - This Fear-Eater then encountered the Captain (a
temporary alias of Steve Rogers better known as Captain America), and confronted him with
fears of being frozen again, as he was when in suspended
animation for decades. The Fear-Eater even animated a
cryogenically frozen man, as the being Cold War, to attack him.
The Captain overcame his fears and expelled the Fear-Eater.

(Marvel Comics Presents#3/4) - The Fear-Eater then encountered the Thing and
capitalized on his fears of being trapped as the thing forever,
and of being alone. Surprisingly enough, the Thing rallied and
overcame his fears, expelling the Fear-Eater.

(Marvel Comics Presents#4/4) - The Fear-Eater then attacked Thor, making him
believe he was trapped on a sickbed while the other gods fought
the final battle, Ragnarok. However, Thor eventually accepted his
fate, and overcame his fear, expelling the Fear-Eater yet again.
Weakened and starving, the Fear-Eater attacked the next human he
found. However, that human happened to be Daredevil, the Man
without Fear, and the Fear-Eater died of starvation.

(Dr. Strange: Sorcerer Supreme#39)-A legion of
Fear-Eaters were summoned forth from a space warp by their hatch
lord, Kkallakku. As part of a plot of the Fear Lords they
assaulted the people of Manhattan, generating and feeding off of
their fear. Dr. Strange withdrew the collective fear from the
Fear-Eaters' victims, and pulled it into himself. The Fear-Eaters
all followed Strange, the fear energy drawing them like moths to
the flame. Strange opened a portal to another dimension and fled
through it, allowing the Fear-Eaters to follow him. He then
teleported back to Earth, leaving the Fear-Eaters behind in that
unnmaed realm.

Comments: Created by Al Milgrom. Not his
best work. The conclusion of the series in MCP was especially
corny.

These fear stories (also common with D'Spayre)
are extremely repetitive and uninteresting. Of course the hero's
going to rally his or her courage and overcome the attacker. What
else could happen?
One of the only good uses of fear by villains was the Fear-Lords
saga, primarily in Dr. Strange III#38-40.